Tire valve and the like



June 15 1926.

E.YA E. HOLT TIRE VALVE AND THE LIKE Filed March '7, 1925 Z/ZU7 i??? Patented June 15, 1926.

UNITEDv STATES PATENT, OFFICE.

EDWARD E. HOLT, OF CHICAGO, ILLINOIS, ASSIGNOR TO EDWARD HOLT CO., Ol'

CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

TIRE VALVE AND THE LIKE.

Application filed Kai-ch 7, 1925. Serial No. 13,892.

This invention relates to improvements in tire valves and the like. present invention has been devised with a view particularly to meet the requirements of valves for neumatic tires, but will presently appear t iat valves embodying the features of the present invention may also be used for many other classes of service.

One object of the invention is t-o provide a tire Avalve ywhich entirely eliminates thc need of using springs or the like for moving the valve plug into the sealing position. In this connection, it is a further object to make provision for sealing the valve so firmly and under such conditions as to make it practically impossible for air to leak out of the tire.

A further object of the invention is to provide a valve construction such that a rubber tipped plug may be very conveniently used in conjunction with a tapering valve seat to establish the sealing of the air within the tire.

A further object of the invention is to provide a construction such that when itl is desired to iniiate the tiie, the valve plug may be moved away from the seat\by the operator, while at the same time maintaining the valve itself effectively sealed against any leakage of air during this operation. This will make it possible to move the plug into the iniating position, and will also make it possible to restore'the plug to the fully sealed position withoutany loss of air in either operation.

`A further object of the inventionv is to provide an arrangement such that when the plug has been fully moved into. the .inflating position it will come to a bearing against another definite valve seat, with which it will assume and maintain sealing engagement until again moved away from such seat by a definite operation of the operator or by the incoming air of inflation. i

A further object of the invention is to provide a construction of valve which is very simple and can be very cheaplyV made by machine operations of very inexpensive nature.

Other objects and uses of the invention will appear from a detailed description of the saine, which consists in thefeatures of construction and combinations of parts hereinafter described and claimed,

The valve of the 'the neck may be conveniently turned,

In the drawing:

Figure 1 shows a longitudinal section through a tire valve embodying the features of the present invention, the plug being forced down into the full sealed position;

Fig. 2 shows a view similar to that of Fig. 1, with the exception that the plug has beenpartially retracted towards the infiatinv posi ion;

Fig. 3 shows a view similar to those of Figs. 1 and 2, with the exception that the, plug has been fully retracted to the inating position;A

Figs. 4, 5 and 6 show cross sections on the lines 4 4, 5--5, and 6 6, respectively, looking in the direction of the arrows; an

Fig. 7 shows a fragmentary view through a modified construction of valve seat.

The valve stem is designated in each instance by the numeral 8. Its lower end is intended to be attached to the inner tube 9 by means of the nuts 10 and 11 in the usual manner.

The stem 8 is provided in its lower portion with a longitudinal bore 12, the up r end of which communicates directly wit a chamber bore.13 at the position of a valve seat 14. The chamber 13 is enlarged at a position substantially midway vof its height to establish a gasket seat 15, as clearly shown in Figs. 1, 2 and 3. A circular gasket 16 of ru ber or other suitable ymaterial is intended to be set in to place at this point.

Theupper end of the chamber opening 13 isinternally threaded,as shown at 17, to receive a collar 18 which may be threaded into place. The lower portion of this co1- lar is inwardly turned and is then again formed downwardly to rovide a flange 19 which serves to establis a circular downwardly facing valve seat. When the collar is threaded into place it comes rmly against the gasket 16 so as to establish Aa sealing connection therewith.

The collar is internally threaded at 20 and a neck 21 reaches through the collar and engages the threads thereof, as clearly shown in the diierent figures: 'The upper portion yof this neck preferably terminates in'an externally threaded stem 22 which may receive the coupling of an air hose, andl beneath said threaded 'portion there is preferabl provided a milled head 23 by means of whic auy neck is fully raised the seat 24 draws upthrough and above the valve .seat 19. The.

extreme upper end of the collar.18 is prefer.- ably beaded inwardly, as shown at 25, so as to engage a shoulder 26 of the neck,"and thus prevent the neck from being fully removed after the parts have been fully assembled.

The neck is provided with a longitudinal bore through which therereaches a stem 27. Said stem is of sufficiently smaller size than the bore to allow inflow or escape of air, as the case may be. The lower end of the stem 27 carries a valve plug 28.` This preferably comprises a metal body to which the stem 27 is directly connected, and Asealing ends 29 and 30 which establish the actual contact with the valve seats for sealing purposes. The portion 29 preferably com rises a small tapered rubber block or tip rlveted to the lower endv of the plug 28; and the portion 30 preferably comprises a disk of rubber or other yieldable material seated into a circular recess in the upper end o'f the plug 28. The tip portion 29 is adapted to wedge into the tapering valve seat 14 when the neck 21 isy forced down, and the plug 30 is adapted to s ealingly engage either of the circular valve seats 19 and 24, as the case maybe, depending upon the exact position of the neck. Vhen the neck is forced clear down to the position of Fig. 1, the valve seat 24 engaoes the disk 30 and upon raising the neck, t is engagement will continue until the valve seat 24 has been raised high enough to Aallow the disk 30 to come against the fixed valve Seat 19. Further movement of the neck will draw its seat 24 away from the disk 30, as is clearly evident from Fig. 3.

lVhen it is desired to deflate the tire, the neck-21 is raised so as to carry the plug 28 away from sealing engagement with the seat `14, and then by pressing down on the upper end of the stem 27, the valve seat 30 is disengaged from either the seat 24 or the4 seat 19, as the case may be, so as to allow escape of air up through the neck and past the stem.

In some cases it may be desirable to make through bore suitably formed to provide al central valve chamber having anoutwardly .facing annular valve seat at its inner end,

a collar in the outer end of the bore, an inwardlyfacing valve seat on the inner end of said collar, a neck threaded through the collar and provided with a longitudinal bore, an inwardly facing valve seat on the innerend of said neck, a valve plu in the central valve chamber having a va ve surface at each end, the valve surface at the inner end of the lug being adapted to engage the outwardly acing valve seat of the valve stem, and the valve surface at the outer end of the plug being adapted to enga e either the valve seat of the collar or t e valve seat of the neck dependin on the position of the neck within the collar, substantially as described.

2., A pneumatic valve for the purpose specifiedcomprising in combination a valve stem having a longitudinally extending through bore suitably formed to provide a central valve chamber having an outwardl facing annular valve seat at its inner en means establishing an inwardly facing valve seat at the outer end of said chamber, a neck reaching into said central valve chamber and provided with a longitudinal bore and having an inwardly facing valve seat at its inner end, a valve plug in the central valve chamber having a valve surface .at each end, the valve surfacev at the innerend of the plu being adapted to engage the Youtwardly acing valve seat aforesaid and the valve surface at the outer end of the plug being adapted to' engage -either of the inwardly facing valve seats aforesaid depending on the position of the neck within the-.valve stem substantially as described.

3. A pneumatic valve for the purpose specified comprising in combination a valve stem having a longitudinally extending through bore suitably formed to provide a central valve chamber having a 'fixed valve seat at its inner end, means for establishing a fixed valve seat at the outer end lof said chamber, said valve seats facing each other, a valve plu in the valve chamber, having a valve sur ace at each end, the valve surfacel at the inner end of the plug being adapted to engage the adjacent valve seat of the valve stem and the' valve seat at the outer end of the phi-g being adapted to engage1 the adjacent xedr valve seat afore-` said, a shiftable inwardly facing valve seat wit-hin the outer 'end of the chamber adapted to engage the valve seat of the outer end of -the plu when said shiftable seat is shifted inward y a sufficient distance with respect to the fixed valve seat at the outer end of the chamber, means reaching to the outside of the valve stem for shifting said shiftable valve seat, and means in conjunction with the Valve plug reaching to the outside of the valve stem operable to shift the position of the 4valve plug from one seat V-to Ithe other, substantially as described.

EDWARD E. HOLT. 

